DTC P2097 [L3]: Notes
DTC P2097 (L3) DETECTION CONDITION & POSSIBLE CAUSES
| DTC P2097 |
Target A/F feedback system too rich |
| DETECTION CONDITION |
- The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than specification, for 35.2 s the PCM determines that the target A/F feedback system is too rich.
MONITORING CONDITIONS
- HO2S feedback fuel control is active.
- Engine speed is 1,500 rpm or more.
- Engine coolant temperature is above 70°C {158°F}.
- HO2S heater is ON.
- Intake air volume is above 4g/s {0.5 lb/min}.
Diagnostic support note
- This is a continuous monitor. (Fuel system)
- MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Leakage exhaust gas
- HO2S malfunction
- Erratic signal-to PCM
- ECT sensor
- MAF sensor
- TP sensor
- Related connector or terminal malfunction
- Related wiring harness malfunction
- A/F sensor malfunction
- Excessive fuel line pressure
- Fuel pump unit malfunction
- Purge valve malfunction
- Insufficient engine compression
- PCM malfunction
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